<template>

<div>
  <el-breadcrumb separator="/">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item>商品管理</el-breadcrumb-item>
    <el-breadcrumb-item>商品分类</el-breadcrumb-item>
  </el-breadcrumb>
  <el-card>
    <el-row>
      <el-col>
        <el-button class="treeTable" type="primary" @click="showAdd">添加分类</el-button>
      </el-col>
        <tree-table :data="cateList" show-index index-text="#" border :show-row-hover="false" :columns="columns" :expand-type="false" :selection-type="false">
          <template slot="isok" slot-scope="scope">
            <i class="el-icon-success" style="color:lightgreen" v-if="scope.row.cat_deleted === false"></i>
            <i class="el-icon-error" style="color:lightgreen" v-else></i>
          </template>
          <template slot="order" slot-scope="scope">
            <el-tag size="mini" v-if="scope.row.cat_level===0">一级</el-tag>
            <el-tag size="mini" type="success" v-else-if="scope.row.cat_level===1">二级</el-tag>
            <el-tag size="mini" type="warning" v-else>三级</el-tag>
          </template>
          <template slot="opt" slot-scope="scope">
             <el-button type="primary" icon="el-icon-edit" size="mini" @click="editCate(scope.row.cat_id)">编辑</el-button>
             <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteCate(scope.row.cat_id)">删除</el-button>
          </template>
        </tree-table>
        <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="queryInfo.pagenum"
          :page-sizes="[3, 5, 10, 15]"
          :page-size="queryInfo.pagesize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
        </el-pagination>
    </el-row>
  </el-card>
  <el-dialog title="添加分类" :visible.sync="addDialogVisible" width="50%" @close="addCateDialogClosed">
    <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="90px">
      <el-form-item label="分类名称：" prop="cat_name">
        <el-input v-model="addCateForm.cat_name"></el-input>
      </el-form-item>
      <el-form-item label="父级分类：" prop="cat_name">
        <!-- options数据源 -->
          <el-cascader clearable v-model="selcetedKeys" :options="parentCateList" :props="cascaderProps"
            @change="parentCatChange">
          </el-cascader>
      </el-form-item>
    </el-form>
    <span slot="footer" class="dialog-footer">
      <el-button @click="addDialogVisible = false">取 消</el-button>
      <el-button type="primary" @click="addCate ">确 定</el-button>
    </span>
  </el-dialog>
  <el-dialog
    title="提示"
    :visible.sync="editDialogVisible"
    width="50%" @close="editDialogClosed">
    <el-form :model="editCateForm" :rules="editCateFormRules" ref="editCateFormRef" label-width="100px">
      <el-form-item label="分类名称" prop="cat_name">
        <el-input v-model="editCateForm.cat_name"></el-input>
      </el-form-item>
    </el-form>
    <span slot="footer" class="dialog-footer">
      <el-button @click="editDialogVisible = false">取 消</el-button>
      <el-button type="primary" @click="editCateInfo">确 定</el-button>
    </span>
  </el-dialog>
</div>
</template>

<script>

export default {
  data () {
    return {
      addDialogVisible: false,
      cateList: [],
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      total: 0,
      columns: [{
        label: '分类名称',
        prop: 'cat_name'
      }, {
        label: '是否有效',
        // 表示将当前列定义为模板列
        type: 'template',
        // 表示当前这一列使用的模板名称
        template: 'isok'
      }, {
        label: '排序',
        // 表示将当前列定义为模板列
        type: 'template',
        // 表示当前这一列使用的模板名称
        template: 'order'
      }, {
        label: '操作',
        // 表示将当前列定义为模板列
        type: 'template',
        // 表示当前这一列使用的模板名称
        template: 'opt'
      }
      ],
      addCateForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      addCateFormRules: {
        cat_name: [{
          require: true, message: '请输入分类名称', trigger: 'blur'
        }]
      },
      parentCateList: [],
      cascaderProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        checkStrictly: true
      },
      selcetedKeys: [],
      editDialogVisible: false,
      editCateForm: {},
      editCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名', trigger: 'blur' },
          { min: 2, max: 10, message: '长度在 2 到 10 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories', { params: this.queryInfo })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败')
      }
      this.cateList = res.data.result
      this.total = res.data.total
    },
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    showAdd () {
      // 先获取父级分类数据列表
      this.getParentCateList()
      // 展示对话框
      this.addDialogVisible = true
    },
    // 获取父级分类的数据列表
    async getParentCateList () {
      const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取失败')
      }
      console.log(res.data)
      this.parentCateList = res.data
    },
    parentCatChange () {
      // console.log(this.selcetedKeys)
      if (this.selcetedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selcetedKeys[this.selcetedKeys.length - 1]
        this.addCateForm.cat_level = this.selcetedKeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate () {
      // console.log(this.addCateForm)
      this.$refs.addCateFormRef.validate(async valid => {
        // eslint-disable-next-line no-useless-return
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败')
        }
        this.$message.success('添加分类成功！')
        // 隐藏添加用户的对话框
        this.addDialogVisible = false
        this.getCateList()
        // 重新获取用户列表数据
      })
    },
    addCateDialogClosed () {
      this.$refs.addCateFormRef.resetFields()
      this.selcetedKeys = []
      this.addCateForm.cat_pid = 0
      this.addCateForm.cat_level = 0
    },
    async editCate (id) {
      const { data: res } = await this.$http.get('categories/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询分类失败')
      }
      this.editCateForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改对话框关闭事件
    editDialogClosed () {
      this.$refs.editCateFormRef.resetFields()
    },
    editCateInfo () {
      this.$refs.editCateFormRef.validate(async valid => {
        // eslint-disable-next-line no-useless-return
        if (!valid) return
        const { data: res } = await this.$http.put('categories/' + this.editCateForm.cat_id, {
          cat_name: this.editCateForm.cat_name
        })
        if (res.meta.status !== 200) {
          return this.$message.error('编辑分类失败')
        }
        this.$message.success('编辑分类成功')
        this.getCateList()
        this.editDialogVisible = false
      })
    },
    async deleteCate (id) {
      const confirmDelete = await this.$confirm('此操作将永久删除该分类, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmDelete === 'cancel') {
        return this.$message.info('后悔药')
      }
      const { data: res } = await this.$http.delete('categories/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      this.getCateList()
      this.$message.success('删除成功')
    }
  }
}
</script>

<style lang="less" scoped>
  .treeTable{
    margin-bottom: 15px;
  }
  .el-cascader{
    width: 100%;
  }
</style>
